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7. A TV repairer estimates the probabilities for the number of hours required to complete some job as follows: Time taken (Hours) Probability a) Find the expected time to complete the job. b) The TV repairer's service is made up of two parts- a fixed cost of $20, plus $2 for each hour taken to complete the job. Find the mean and standard deviation of total cost. 1 2 3 4 5 0.05 0.2 0.35 0.3 0.1

7. A TV repairer estimates the probabilities for the number of hours required to complete some job as follows: Time taken (Hours) Probability a) Find the expected time to complete the job. b) The TV repairer's service is made up of two parts- a fixed cost of $20, plus $2 for each hour taken to complete the job. Find the mean and standard deviation of total cost. 1 2 3 4 5 0.05 0.2 0.35 0.3 0.1

A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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7. A TV repairer estimates the probabilities for the number of hours required to complete some job as follows: Time taken (Hours) Probability a) Find the expected time to complete the job. b) The TV repairer's service is made up of two parts- a fixed cost of $20, plus $2 for each hour taken to complete the job. Find the mean and standard deviation of total cost. 1 2 3 4 5 0.05 0.2 0.35 0.3 0.1
Transcribed Image Text:7. A TV repairer estimates the probabilities for the number of hours required to complete some job as follows: Time taken (Hours) Probability a) Find the expected time to complete the job. b) The TV repairer's service is made up of two parts- a fixed cost of $20, plus $2 for each hour taken to complete the job. Find the mean and standard deviation of total cost. 1 2 3 4 5 0.05 0.2 0.35 0.3 0.1
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